Improvement in lamps



B. MANN & s. sjmANN. lm'provementlin Lamps. N0. 114,954. i Patented Maj/16,1871.

, ilttit Start (brunetta.

CHARLES B; MANN AND VSTEPHEN s. MANN, 0E BALTIMORE, MARYLAND.

` r Letters'Patent No.114,954, dated May 16,1871.

' IMPRoyEMENT IN LAMPS;

To all whom t may concern:

Be it known that we, CHARLES B. MANN and STEPHEN S. MANN, of Baltimore, in the county of Baltimore and State of Maryland, have invented a new and useful Improvement in Lamps and we do hereby declare the following to be afull, clear, and exact description of the same, reference being had to the accompanying drawing making a part of this specification, in which- Fignre l is a side elevation ofthe connecting-drum and wick-tube.

Figure 2 is a sectional elevation of the same.

Figure 3 is a transverse section of the drum.

The invention relates to an attachment for lamps for burning hydrocarbon oils, and consists in the construction and arrangement of a drum and wick and filling-tube, the said drum being designed to be interposed between the bulner and lamp proper, and hav'- ing anzopenng, closed-by an inner slide, through which the lamp-reservoir maybe replenished without removing the burner or chimney or extinguishing the light, and the wick-tube extending down nearly to the bottom of the lamp-reservoir or fonnt .and being separated from the screw-neck of the drum so as to form a passage leading up into an annular chamber formed in the lower part of the drum, and provided with o'utlets, as hereinafter more fullydescribed.

Referring to the drawinga, is the connecting-drum, provided with male and female screw, and interposed between the burner and collar of the lamp. In its longitudinal section said drum may be variously shaped, the object being to provide room for a suiiciently large opening to admit the feeder-nozzle and at same time avoid unnecessarily elevating the burner.

Fitted within this connecting-drum is a segmentalA slide, b, made'of spring brassl which retainsits place by pressing against' the interior of the drum, and is actuated on the outside by a thumb-piece, c, and stop.

This slide is in the form of a divided ring, or a ring with a section out eut so as toAleave an opening corresponding in width to the orifice in the side of the drum. The expansion of the ringslide, which is, in effect, a spring, holds it in close contact with the inner wall of the drum so as to effectually prevent the escape of oil when the same is closed.A

By moving this slide one way the opening will admit the nozzle 'of the can, and by moving it in the op- .posite` direction the opening is closed.

The slide is so shaped that while it retains its place by pressing against the inside of thedrum but a small portion of its surface comes in contact with the inside of the drum; and in this way excessive friction, when the slide is moved in opening and closing, is avoided.

'lhe advantage of this arrangement is that the lampreservoir may be relled without'unscrewing or removing th'e burner or chimney, and even while the lamp is lighted and burning at full dame.

An incidental advantage of this enlarged conuecting-drum is that, being interposed between the burner and collar, it, by partially isolating the burner, acts vas anintervening insulator, breaking the conduction .of heat from the burner.

The wick-chamber c is a long tube extending down into the reservoir or fonnt to near the bottom, inclosing the wick in a gas-tight compartment. The wickchamber is made preferably round, and large enough internally to easily admit the size of wick intended to be used, whether it be tubular or dat. rlhe upper end of this wick-chamber is fitted within and secured t0 an annular plate' or metallic diaphragm that is tightly secured within the drum a, just above the outlets or Ventilating-holes hereinafter referred to.

When the lamp is constructed without the filling attachment the wick-chamber may be dilferently secured; in such case, the upper end of the long tube may be turned over outward, formingits edge into a flange, e, which is then made fast within the connecting-drum, which, in this case, will be of less diameter than when employed as a filling attachment.

The wick-chamber or tube then passes downward through the male screw, leavngan intervening space between.

A series of small ventilatingholes, i, largeenough ,toaiford escape for the vapor or gas generated within the reservoir, but too small to allowthe inward passage of llame, is arranged in the connecting-drum.

These holes are under the annular plate, into which the end of the long tube is secured, or under the ontward-turned Bange at the top of the long tube.

The vapor or gas within the lamp-reservoir can pass up around the outside ofthe wick-chamber, through the intervening space, until it reaches these outlets, and thence escapes fromthe inside of the lamp to a distance suiicient to prevent ignition without endangering an explosion. y

l/Vhen lling the lamp these 'holes allow the air-,or gas within to escape, as the same is displaced by the oil that is turned in. The wick being inclosed, the supply of oil te feed the iiame is always taken from the bottom of the reservoir, and no vapor or gas can surround the wick within, as the wich-chamber is al ways closed with oil at its lower end, and there being no other connection between its interior and the reservoir.

rlhe long tube or vchamber at its lower' end is rounded on the edge, so that as the wick is raised thecnd depending below will not catch.

rllhis may be applied to any lamp or burner.

Having thus described our'iuvention,

What we claim as' new, and desire to secure by Letters Patent, is-

1. The' spring slide b, constructed and arranged in. connection with the drum a, as herein shown and described.

2. The safety-filling attachment for lamps, formed of longwick and lling-tube .0', connected with theY drum a by means of a horizontal flange forming the imperforate bottom thereof, said drum being provided with the lateral opening closed by the slide b, substantially as speoiied.

3. The'vlong wick and filling-tube cand connectingdrum a, constructed and arranged, as specified, to form an annular gas-chamber, which is provided with outlets i in the bottom, delivering the gas downward, as set forth.v

Witnesses:

HARRY G. GRAY, ARCHD. TEAL. 

